Device for teaching milking.



P. J. DE VRIES.

DEVICE FOR TEACHING MILKING.

APPLICATION FILED JUNE 3, 1909.

933 ,535. Patented Sept. 7, 1909.

WIT IVESSES INVENTOR W Peter J22 l'z'eJ lg/w M 7f KZ'WK; ATTORNE rs IOFFICE.-

' rn'mn 3. ma: yams, 02 Kent, IOWA.

) nnv1c1: .ron mmcnmc immune.

Specification of Letters Patent.

Application iiled June 3, 1909. Serial No. 499,849.

PatentedSept. 7, 1909.

To all whom it may concern:

Be it known that I, PETER J. DE Vnms, a citizen of the United States,and a resident of Hull, in the county of Sioux and Stateof Iowa, haveinvented a new and Improved Device for Teachin Milking, of which thefollowing is a fufi, clear, and exact description.

The expert extraction of -milk from the adder of a cow re uiresconsiderable practice, and asthe e 'orts of one who is not experiencedirritate the animal, the work of learning is slow, as the cow may resistthe efforts ofthe learner.

The purpose of this invention is to provide a novel mechanical device,that simulates the udder and teats of a cow pendent therefrom, togetherwith 'other details that afford means for practicing the removal ofwater from the artificial udder by a proper compression of the teats,and thus acquire the art of milking quickly and safely, so as to be ableto extract milk from the natural udder of a cow.

The invention consists in the novelconstruction and combination of artsas is hereinafter described and define in the appended claims. V

Reference is to be had to the accompanying drawings formin a part ofthis 'specifi-- cation, in which simi ar characters of referenceindicate corresponding parts in all the views.

Figure 1 is a side view of'the improvement; Fig. 2 is a sectional sideview of the same; and Fig. 3 is a transverse sectional view of one ofthe pendent teats, taken substantially on the line 3-3 in Fig. 2.

In the drawings, 5 indicates an artificial udder, which as shown is inthe form of a cup-like vessel or receptacle, that is open at thenormally upper end and closed at the bottom by a transverse wall 5*. Thereceptacle 5 is preferably formed of waterproof, pliable material, andupon the bottom wall 5 near the side wall of the receptacle, two similardiametrically opposite pendent teats 6 are formed, of proper dimensionsto resemble the natural teats on the udder of a cow.

The teats 6 are of soft rubber, and are nearly cylindrical, each havinga neck a of slightly reduced diameter where the teat joins the bottomwall 5, and as shown in Fig. 2 said bottom is concaved above each teat,so as to conduct liquid thereto. Centrally in the neck a of each teat.6a small perforation b is formed, that extends toward the normally lowerend 0 thereof, and. as shown at the left in Fig. 2, the perforation I)intersects an elongated chamber d that is centrally reduced in the bodof the teat. The cham er d is of such 'ameter as 'will render thedefining side'wall of the teat quite compressible, so as to simulate theylelding nature of a natural teat, and

as .shown said chamber terminates at a suitable distance from theextremity c in a small longitudinal central Ipassa' e e thatcommunicates with a cup-1i e va ve chamber g. Y A

Centrally through. the lowerwall of the chamber 9 an orifice It extends,affording a discharge passage forliquid through the lower end 0 of theteat 6. A disk valve 7 is provided for each teat 6, these similar valveseach consisting of a clrcularly edged flat planchet .of rubber, havingproper e asticity for effective service, and such a eripheral dimensionas will adapt the va ve to fit closel in the upper portion of the valvecham er, so as to normally contact with the perforated top wall thereof.The disk valve 7 for each teat 6 is furnished with a lurality of spacedsmall perforations 2' t at are arranged near the edge of the disk,thusleaving the space inside the circular row of perforations solid andthus adapted to normally seal the perforation e.

In the side wall of the vessel 5 near the upper edge thereof, two spacedperfopations is are formed, that will receive nails 'or the like whichproject from a stable support, such as an upright wall or post. Thecapacity of the vessel or receptacle 5 may with advantage be about equalwith that of the udder of a cow.

To prepare for use, the device should be hung at a height that. willpermit the user to occupy a chair or other seat, when practicin with thesame. Water being introduce within the receptacle 5, the gravity of theliquid will cause it to descend through the passages 6 into the chamberd, and distend the side walls of the tea-ts 6 if they have previouslybeen compressed. It will be seen that the normal contact of the valves 7with the lower surface of the upper wall ofjthe valve chambers g, willprevent an escape of liquid from the chambers 11 unless pressure isapplied thereon. v

To effect the operation of milking in a the teat 6 which hasbeen-subjecte manner similar to that necessary for the free extractionof milk from the teats of a cow, the operator gently clasps the teats'6with his hands, and by an increase of pressure thereon together with adownwar movement of his hands, presses the liquid through theperforations e against the centers of the disk valves 7. The pressurethus produced on the valves 7' renders them concave on their uppersides, thuspermitting theliquid to pass through the perforations i intothe lower portions of the valve chambers g from which-it is e elledthrough the discharge orifices h. It 15 customary to take hold of twoteats that depend cow at one time, and exert milking pressure thereonalternately, relaxing pressure on one it to recelve milk from teat so asto permit liquid is pressed out of the udder, while the the other one.

It will be noted in Fig. 2, at the ri ht, that stricting pressure of thehand is somewhat elongated, and correspondingly reduced in diameter, andfurther, that the valve 7 in said teat is dished slightly, thus 0 eningthe passage 0 for discharge of liqui from the perforation b. Uponrelaxing normal pressure on the teats 6, alternately, after the liquidhas been forced out of the perforations h, the elasticity of the sidewalls of the teat that pressure is removed from, will togather with thedo nward pressure of liquid om the receptac e 5, cause the teat toresume its normal condition, as is shown at the left in Fig. 2. ;v

While the operation seems simple, it requires dexterity and expertmanipulation that can only be acquired by practlce; but as the operatormay use-the teaching device at any t1me, and as lon as is desired, whichcannot be done when milking a cow, one may in a. corn aratively shorttime become an ker of the mechanical representaand as the milkingoperations are exactly alike, but slight additional ex perience will benecessary to enable the person thus taught to properly milk a cow.

expertmi tive of a cow,

from the udder of a to con-,. 1

' Having thus described my invention, I claim as new and desireto-secure by Letters Patent: 7

l. A device for teachinfimilking, comprrgsmg a liquid holder, an a teatthereon,

in manipulation. o

2. A device'for teaching milking, comprising 'a liquid'holder, and teatspendent thereon, from which the liquid may beexpelled by manipulation.

3. A device for teaching milking, com prising a liquid holder, entthereon, from which the liquid may be expelled my manipulation, andmeans for controlling the discharge of liquid.

4. A device for teaching milking, comprising a supported liquid holder,a plurality of similar hollow teats pendent from the holder, control.the discharge of liquidtherefrom.

5. A device for teaching milking, comprising a supported liquidholder, apluralty of hollow teats pendent from and in communication with saidholder, each teat having a valve chamber in the lower end thereof,

and a disk valve in eachchamber that is opened b compression ofthe'teat.

6. A evice for teaching milking,'comand a valve in each teat adapted toahollow teat pend-' prising a supported liquid holder, a plural ity ofhollow teats pendent from and in communication with said holder, eachteat having-a valve chamber-in its lower'portion, the to wall of whichis centrally perforated, said chamber also having a discharge orifice inits lower wall, and a disk valve for each chamber, having a plurality ofperforations near its edge that are adapted to be opened when manualpressure is applied to the side wall of a respective teat.

In testimony whereof I have name to this specification in twosubscribing witnesses.

PETER J. DE VRIES.

signed my the presence of Witnesses:

J. S. WILSON,

D. J. VAN nun SoHAAr.

